/*
 * Copyright 2011 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package net.peterkuterna.android.apps.devoxxsched.util;

import android.app.Activity;
import android.app.Service;
import android.os.Bundle;
import android.os.Handler;
import android.os.ResultReceiver;
import android.util.Log;

/**
 * Proxy {@link ResultReceiver} that offers a listener interface that can be
 * detached. Useful for when sending callbacks to a {@link Service} where a
 * listening {@link Activity} can be swapped out during configuration changes.
 */
public class DetachableResultReceiver extends ResultReceiver {

	private static final String TAG = "DetachableResultReceiver";

	private Receiver mReceiver;

	public DetachableResultReceiver(Handler handler) {
		super(handler);
	}

	public void clearReceiver() {
		mReceiver = null;
	}

	public void setReceiver(Receiver receiver) {
		mReceiver = receiver;
	}

	public interface Receiver {
		public void onReceiveResult(int resultCode, Bundle resultData);
	}

	@Override
	protected void onReceiveResult(int resultCode, Bundle resultData) {
		if (mReceiver != null) {
			mReceiver.onReceiveResult(resultCode, resultData);
		} else {
			Log.w(TAG, "Dropping result on floor for code " + resultCode + ": "
					+ resultData.toString());
		}
	}

}
